start introducing modules

zfs_backup/snapshot.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+from re import search
+
+from dataset import Dataset
+from zfs import ZFS
+from zfs_path import ZFSPath
+
+
+class Snapshot:
+    def __init__(self, path: ZFSPath):
+        self._path = path
+
+    @classmethod
+    def from_string(cls, qualified_name: str) -> Snapshot:
+        return cls(ZFSPath.from_string(qualified_name))
+
+    def __gt__(self, other: Snapshot) -> bool:
+        return self.snapshot_name > other.snapshot_name
+
+    def __repr__(self):
+        return str(self._path)
+
+    def __eq__(self, other: Snapshot):
+        return self._path == other._path
+
+    def newer_than(self, other: Snapshot) -> bool:
+        return self > other
+
+    @property
+    def snapshot_name(self) -> str:
+        assert self._path.snapshot_name
+        return self._path.snapshot_name
+
+    def matches_regex(self, regex: str) -> bool:
+        """Check if the qualified name of the snapshot matches a regular expression."""
+        return bool(search(regex, str(self._path)))
+
+    def destroy(self) -> None:
+        ZFS.destroy_snapshot(self)
+
+    @property
+    def pool(self) -> str:
+        return self._path.pool_name
+
+    @property
+    def dataset(self) -> Dataset:
+        return Dataset(self._path.dataset)